Multi-special-shaped path composite surface strengthening method based on ultrasonic peening-rolling

Abstract

The invention relates to a multi-special-shaped path composite surface strengthening method based on ultrasonic peening-rolling. The multi-special-shaped path composite surface strengthening method comprises the following steps that S1, a base material is pretreated; s2, a proper iron-based alloy powder proportion is selected, and the powder is treated; s3, preparing a coating on the surface of the substrate by adopting a laser cladding technology; and S4, carrying out flaw detection development on the surface of the coating. If cracks exist, returning to S3 to prepare the coating again; s5, eliminating residual stress between the coating and a matrix interface by adopting post-heat treatment; and S6, the surface of the coating is milled, the remanufactured coating meeting the standard is subjected to ultrasonic peening and ultrasonic rolling composite treatment through ultrasonic peening and ultrasonic rolling equipment, and the surface integrity is improved. By means of the strengthening method, ultrasonic peening and ultrasonic rolling collaborative machining strengthening is carried out. The phenomenon that the surface integrity is poor after ultrasonic peening is avoided, and the phenomenon that hard materials are difficult to conduct ultrasonic rolling machining is also overcome.

Description

Technical Field

[0001] The invention relates to the technical field of metal surface strengthening treatment equipment, and in particular to a multi-profile path composite surface strengthening method based on ultrasonic impact-rolling. Background Art

[0002] The principle of ultrasonic impact is that the impact needle rebounds after being reacted by the metal component, and after hitting the high-frequency vibrating amplitude rod of the impact gun, it is excited again and hits the metal component at high speed again and repeats this process many times to achieve the purpose of strengthening the metal surface. In the prior art, ultrasonic impact mostly uses a manual handheld impact gun to impact metal components. Due to the long processing time, the operator needs to endure greater physical exertion. In addition, due to the uneven impact force generated by the impact needle in the high-frequency reciprocating motion, it is difficult to ensure the stability of its force by manual labor alone, which has a certain impact on the processing quality. The principle of rolling processing is to roll a high-hardness steel ball on a relatively soft workpiece material, thereby forcing the surface of the workpiece to produce plastic deformation to achieve the purpose of surface strengthening.

[0003] Although some scholars have tried to use machine tools for processing, the high-frequency continuous impact will cause the machine tool accuracy to decrease, and the technical maturity still needs to be improved. Ultrasonic impact usually uses a semi-circular impact needle with a surface of . After strengthening, a uniform circular impact pit structure appears on the surface, affecting the surface integrity. In subsequent use, fatigue cracks may initiate from the weak impact points. Ultrasonic rolling can significantly improve the surface roughness of the workpiece, and produce severe plastic deformation on the workpiece surface, increasing the surface hardness and residual compressive stress. However, there is little gain in cemented carbide.

[0004] In addition, in the prior art, most of the integrated ultrasonic impact and ultrasonic rolling equipment performs one operation and then replaces the impact head or rolling head to perform another operation, which reduces the processing efficiency. For example, a Chinese patent with publication number CN108480913A discloses a multi-purpose ultrasonic rolling and impact equipment, which can not only perform ultrasonic rolling treatment on cylindrical components, but also perform surface rolling and impact on plate-like components, and can automatically complete the impact and rolling. When the equipment is used, the ultrasonic impact and ultrasonic rolling are divided into two steps, and the efficiency is low when processing the workpiece.

[0005] In order to solve the above problems, the present invention proposes a multi-profile path composite surface strengthening method based on ultrasonic impact-rolling. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, meet practical needs, and provide a multi-profile path composite surface strengthening method based on ultrasonic impact-rolling to solve the above-mentioned technical problems.

[0007] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is:

[0008] A multi-profile path composite surface strengthening method based on ultrasonic impact-rolling: comprising the following steps:

[0009] S1. Matrix material pretreatment

[0010] The oxide film and oil stains in the damaged area of ​​45CrNiMoVA steel were removed by using 200-mesh and 400-mesh sandpaper, and the surface was cleaned with anhydrous ethanol to show the damaged area.

[0011] S2. Select a suitable iron-based alloy powder ratio and process the powder;

[0012] The weight ratio of each element in the iron-based alloy powder is: C 0.18%-0.24%, Ni 1.8%-2.5%, Cr17%-18.5%, Mn 0.13%-0.25%, Si 0.9%-1.2%, B 1.1%-1.4%, the balance is iron, the powder particle size is 45-150μm, and the spherical powder is ≥90%. The alloy powder is dried in a drying oven at 110℃ for 2h and set aside.

[0013] S3. Use laser cladding technology to prepare the coating on the substrate surface.

[0014] The powder obtained from S2 was used to prepare the coating on the substrate surface using laser cladding technology.

[0015] S4. Perform flaw detection and development on the coating surface to observe whether there are micro cracks on the surface. If there are cracks, return to S3 to prepare the coating again.

[0016] S5. Post-heat treatment is used to eliminate the residual stress between the coating and the substrate interface. The heat treatment temperature is 240℃±10℃, the insulation time is 2h, and then the furnace is cooled for 1 hour and then taken out for air cooling.

[0017] S6. Mill the coating surface and perform ultrasonic impact + ultrasonic rolling composite treatment on the remanufactured coating that meets the standards through ultrasonic impact and ultrasonic rolling equipment to improve the surface integrity.

[0018] Furthermore, the ultrasonic impact parameters are as follows: ultrasonic frequency 21.5 kHz, working current 1.6 A, amplitude 30 μm to 50 μm, moving speed 20 mm / s, overlap width 2 mm, and coverage 300%.

[0019] Furthermore, in the step S4, surface cracks are observed in a cleaning-coloring-developing sequence.

[0020] An ultrasonic impact and ultrasonic rolling equipment comprises a machine base, the upper surface of which is fixedly connected to a spindle box, one side of which is rotatably connected to a spindle clamp, the upper surface of which is fixedly connected to a guide seat, the upper surface of which is slidably connected to a tail stock, a feed rod is arranged in the tail stock, one end of which is rotatably connected to a movable clamp, the spindle clamp cooperates with the movable clamp to fix a rod-shaped workpiece, the upper surface of the machine base is slidably connected to a movable seat, an ultrasonic impact assembly and an ultrasonic rolling assembly are respectively arranged on the upper surface of the movable seat, the ultrasonic impact assembly and the ultrasonic rolling assembly are respectively located on the front and rear sides of the rod-shaped workpiece, and the spindle clamp drives the rod-shaped workpiece to rotate to cooperate with the simultaneous processing of the ultrasonic impact assembly and the ultrasonic rolling assembly.

[0021] Furthermore, the upper surface of the movable seat is fixedly connected to two electric slides, and the ultrasonic impact assembly and the ultrasonic rolling assembly are fixedly installed on the driving ends of the two electric slides, respectively. The ultrasonic impact assembly and the ultrasonic rolling assembly are arranged along the radial direction of the rod-shaped workpiece, and the ultrasonic impact assembly and the ultrasonic rolling assembly act on both sides of the rod-shaped workpiece to offset the force.

[0022] Furthermore, a threaded screw is rotatably connected to the inner wall of the guide seat, the movable seat is in an inverted U shape, and a fixed block is fixedly connected to the inner wall of the movable seat, a threaded hole is provided on one side of the fixed block, and the threaded hole is threadedly connected to the surface of the threaded screw, and a motor is fixedly connected to one side of the machine base, and one end of the threaded screw passes through the surface of the guide seat and is fixedly connected to the output end of the motor.

[0023] Furthermore, a cavity is formed inside the movable seat, the inner wall of the cavity is fixedly connected to a cover plate, the upper surface of the cover plate is provided with a mounting opening, and the inner wall of the mounting opening is fixedly connected to a cooling fan, the surface of the movable seat is provided with an air inlet, and the inner wall of the air inlet is fixedly connected to a filter.

[0024] Furthermore, a support member is fixedly connected to the upper surface of the machine base, and the support member has a vertically arranged stand, and a support seat inclined toward the rod-shaped workpiece is formed on the top of the stand, the stand and the support seat are integrally formed, and a cleaning member is fixedly connected to the support seat.

[0025] Furthermore, the interior of the support member is hollow, the upper surface of the support seat is provided with a collecting port for receiving swept dust, a collecting box is arranged inside the stand, a through opening for the collection box to enter and exit is provided on the front of the stand, and a handle is fixedly connected to the front of the collection box.

[0026] Furthermore, the cleaning member comprises a mounting rod, a surface of which is fixedly connected with bristles, and the bristles are in contact with the filter screen.

[0027] Furthermore, the cleaning member also includes a mounting shell fixedly connected to the support seat, the mounting shell is cylindrical with openings at both ends, the mounting shell is communicated with the support seat, the inner wall of the mounting shell is fixedly connected with a shell cover, the mounting rod is cylindrical, and the top end of the mounting rod is rotatably connected to the lower surface of the shell cover, the mounting rod and the mounting shell are coaxially arranged, the surface of the mounting rod is provided with a plurality of mounting surfaces, and a plurality of groups of bristles are fixedly connected to the mounting surfaces, a avoidance opening for the bristles to extend out is provided at a position on the surface of the mounting shell opposite to the filter screen, a strip-shaped protrusion is fixedly connected to the inner wall of the mounting shell, and the rotation of the mounting rod can drive the plurality of groups of bristles to be in the avoidance opening position in turn to clean the filter screen.

[0028] The transmission gear of the present invention is a gear which is engaged with the gear of the driven gear and is preferably used for gearing up to drive the gear of the driven gear to rotate with the gear of the driven gear.

[0029] Furthermore, a vertical plate is fixedly connected to the upper surface of the shell cover, a sliding hole is provided on the front side of the vertical plate, and a sliding rod is slidably connected to the inner wall of the sliding hole, a spherical positioning end is formed at the top of the sliding rod, a plurality of positioning grooves matched with the positioning end are provided on the surface of the connecting shaft, one end of the sliding rod is fixedly connected to a spring seat, a return spring is sleeved on the surface of the sliding rod, one end of the return spring is fixedly connected to the vertical plate, and the other end of the return spring is fixedly connected to the spring seat.

[0030] Beneficial effects:

[0031] 1. In the present invention, ultrasonic impact processing and ultrasonic rolling processing can be performed on a rod-shaped workpiece respectively by arranging an ultrasonic impact component and an ultrasonic rolling component. By arranging the ultrasonic impact component and the ultrasonic rolling component on the front and rear sides of the rod-shaped workpiece respectively so that the ultrasonic impact component and the ultrasonic rolling component can act on the rod-shaped workpiece at the same time, the processing efficiency of the rod-shaped workpiece can be improved. By arranging a rotatable spindle clamp, the rod-shaped workpiece can be driven to rotate, thereby improving the uniformity of processing, so that the ultrasonic impact and ultrasonic rolling equipment has the characteristic of improving the processing efficiency of the workpiece.

[0032] 2. In the present invention, by arranging the ultrasonic impact assembly and the ultrasonic rolling assembly along the radial direction of the rod-shaped workpiece, the ultrasonic impact assembly and the ultrasonic rolling assembly can act on both sides of the rod-shaped workpiece to offset the force, thereby reducing the vibration of the rod-shaped workpiece and improving the processing effect. The vibration of the rod-shaped workpiece is reduced by cooperating with the spindle clamp and the movable clamp, and the spindle clamp is used to drive the rod-shaped workpiece to rotate, thereby improving the uniformity of stress distribution and further reducing the vibration of the workpiece, so that the ultrasonic impact and ultrasonic rolling equipment has a good processing effect.

[0033] 3. In the present invention, by providing a heat dissipation fan, the processing parts of the ultrasonic impact component and the ultrasonic rolling component can be cooled, thereby reducing the high degree of vibration of the rod-shaped workpiece due to the increase in temperature. By providing a cleaning piece, the filter net can be cleaned by the cleaning piece when the movable seat moves to avoid clogging of the cleaning net. By providing a strip-shaped protrusion, the bristles can be deformed to change the gaps between the bristles, thereby facilitating the cleaning of dust attached to the bristles.

[0034] 4. Through this strengthening method, ultrasonic impact and ultrasonic rolling are carried out to strengthen the surface in a coordinated manner, which can solve the problem of poor surface integrity after ultrasonic impact and overcome the difficulty of ultrasonic rolling processing on hard materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0036] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0037] Figure 3 For the present invention Figure 1 A schematic diagram of the enlarged structure at B in the middle;

[0038] Figure 4 It is a front view structural schematic diagram of the present invention;

[0039] Figure 5 It is a schematic diagram of the three-dimensional structure of the mobile seat of the present invention;

[0040] Figure 6 It is a schematic diagram of the side section structure of the mobile seat of the present invention;

[0041] Figure 7 It is a schematic diagram of the three-dimensional structure of the support member of the present invention;

[0042] Figure 8 It is a schematic diagram of the side section structure of the support member of the present invention;

[0043] Fig. 9 For the present invention Figure 8 Schematic diagram of the enlarged structure at C in the middle;

[0044] Fig.10 For the present invention Figure 8 Schematic diagram of the enlarged structure at D in the middle;

[0045] Fig.11 It is a schematic diagram of the three-dimensional structure of the installation shell of the present invention;

[0046] Fig.12 Schematic diagram of the surface strengthening method.

[0047] The reference numerals are as follows:

[0048] 1. Machine base; 2. Spindle box; 3. Spindle fixture; 4. Guide seat; 5. Tail stock; 6. Feed rod; 7. Movable fixture; 8. Rod-shaped workpiece; 9. Moving seat; 10. Ultrasonic impact assembly; 11. Ultrasonic rolling assembly; 12. Electric slide; 13. Threaded screw; 14. Fixed block; 15. Motor; 16. Cavity; 17. Cover plate; 18. Cooling fan; 19. Filter; 20. Stand; 21. Support seat; 22. Collection port; 23. Collection box; 2 4. Handle; 25. Mounting rod; 26. Brush; 27. Mounting shell; 28. Shell cover; 29. ​​Mounting surface; 30. Bar protrusion; 31. Support plate; 32. Rotating shaft; 33. Active bevel gear; 34. Connecting shaft; 35. Driven bevel gear; 36. Active pulley ring; 37. Driven pulley; 38. Transmission belt; 39. Residual gear; 40. Driven gear; 41. Vertical plate; 42. Sliding rod; 43. Positioning end; 44. Spring seat; 45. Return spring. DETAILED DESCRIPTION

[0049] The following is combined with Figure 1-11 The present invention is further described with examples:

[0050] Example 1

[0051] like Figure 1-11 As shown, an ultrasonic impact and ultrasonic rolling equipment includes a machine base 1, a spindle box 2 is fixedly connected to the upper surface of the machine base 1, a spindle clamp 3 is rotatably connected to one side of the spindle box 2, a guide seat 4 is fixedly connected to the upper surface of the machine base 1, a tail stock 5 is slidably connected to the upper surface of the guide seat 4, a feed rod 6 is arranged in the tail stock 5, one end of the feed rod 6 is rotatably connected to a movable clamp 7, the spindle clamp 3 cooperates with the movable clamp 7 to fix a rod-shaped workpiece 8, a movable seat 9 is slidably connected to the upper surface of the machine base 1, an ultrasonic impact component 10 and an ultrasonic rolling component 11 are respectively arranged on the upper surface of the movable seat 9, the ultrasonic impact component 10 and the ultrasonic rolling component 11 are respectively located on the front and rear sides of the rod-shaped workpiece 8, the spindle clamp 3 drives the rod-shaped workpiece 8 to rotate to cooperate with the simultaneous processing of the ultrasonic impact component 10 and the ultrasonic rolling component 11.

[0052] Specifically, by setting up an ultrasonic impact component 10 and an ultrasonic rolling component 11, ultrasonic impact processing and ultrasonic rolling processing can be performed on the rod-shaped workpiece 8 respectively. By setting the ultrasonic impact component 10 and the ultrasonic rolling component 11 on the front and rear sides of the rod-shaped workpiece 8 respectively so that the ultrasonic impact component 10 and the ultrasonic rolling component 11 act on the rod-shaped workpiece 8 at the same time, the processing efficiency of the rod-shaped workpiece 8 can be improved. By setting up a rotatable spindle clamp 3, the rod-shaped workpiece 8 can be driven to rotate, thereby improving the uniformity of processing, so that the ultrasonic impact and ultrasonic rolling equipment has the characteristic of improving the workpiece processing efficiency, wherein the machine base 1, the spindle box 2, the spindle clamp 3, the guide seat 4, the tailstock 5, the feed rod 6 and the movable clamp 7 are existing technologies.

[0053] Two electric slides 12 are fixedly connected to the upper surface of the movable seat 9, and the ultrasonic impact assembly 10 and the ultrasonic rolling assembly 11 are fixedly installed on the driving ends of the two electric slides 12, respectively. The ultrasonic impact assembly 10 and the ultrasonic rolling assembly 11 are arranged along the radial direction of the rod-shaped workpiece 8, and the ultrasonic impact assembly 10 and the ultrasonic rolling assembly 11 act on both sides of the rod-shaped workpiece 8 to offset the force. By arranging the ultrasonic impact assembly 10 and the ultrasonic rolling assembly 11 along the radial direction of the rod-shaped workpiece 8, the ultrasonic impact assembly 10 and the ultrasonic rolling assembly 11 can act on both sides of the rod-shaped workpiece 8 to offset the force, thereby reducing the vibration of the rod-shaped workpiece 8 and improving the processing effect. The vibration of the rod-shaped workpiece 8 is reduced by cooperating with the spindle clamp 3 and the movable clamp 7. At the same time, the spindle clamp 3 is used to drive the rod-shaped workpiece 8 to rotate, thereby improving the uniformity of stress distribution and further reducing the vibration of the workpiece, so that the ultrasonic impact and ultrasonic rolling equipment has a good processing effect.

[0054] A threaded screw 13 is rotatably connected to the inner wall of the guide seat 4, the movable seat 9 is in an inverted U shape, and a fixed block 14 is fixedly connected to the inner wall of the movable seat 9. A threaded hole is provided on one side of the fixed block 14, and the threaded hole is threadedly connected to the surface of the threaded screw 13. A motor 15 is fixedly connected to one side of the machine base 1. One end of the threaded screw 13 penetrates the surface of the guide seat 4 and is fixedly connected to the output end of the motor 15. The threaded screw 13 is driven to rotate by the output end of the motor 15, thereby driving the fixed block 14 to move, thereby driving the movable seat 9 to move, and thereby driving the ultrasonic impact assembly 10 and the ultrasonic rolling assembly 11 to move synchronously, so as to realize automatic processing of the rod-shaped workpiece 8.

[0055] A cavity 16 is formed inside the movable seat 9, and a cover plate 17 is fixedly connected to the inner wall of the cavity 16. A mounting opening is provided on the upper surface of the cover plate 17, and a heat dissipation fan 18 is fixedly connected to the inner wall of the mounting opening. An air inlet is provided on the surface of the movable seat 9, and a filter screen 19 is fixedly connected to the inner wall of the air inlet. By providing the heat dissipation fan 18, heat can be dissipated from the processing parts of the ultrasonic impact component 10 and the ultrasonic rolling component 11, thereby reducing the high degree of vibration of the rod-shaped workpiece 8 due to the increase in temperature. By providing the filter screen 19, dust can be prevented from being carried to the surface of the rod-shaped workpiece 8.

[0056] A support member is fixedly connected to the upper surface of the machine base 1, and the support member has a vertically arranged stand 20. A support seat 21 inclined toward the rod-shaped workpiece 8 is formed on the top of the stand 20. The stand 20 and the support seat 21 are integrally formed. A cleaning member is fixedly connected to the support seat 21, and cleaning support is provided by setting the support member.

[0057] The interior of the support member is hollow, and a collecting port 22 is provided on the upper surface of the support seat 21 for receiving swept dust. A collecting box 23 is provided inside the stand 20, and a through opening for the collection box 23 to enter and exit is provided on the front of the stand 20. A handle 24 is fixedly connected to the front of the collection box 23 to allow the fallen dust to enter the collection box 23 through the collecting port 22, thereby facilitating centralized dust treatment.

[0058] The cleaning part includes a mounting rod 25, the surface of which is fixedly connected with bristles 26, and the bristles 26 are in contact with the filter 19. By arranging the bristles 26, when the filter 19 moves with the movable seat 9, the dust attached to the surface of the filter 19 is brushed off. Due to the dust of the cooling fan 18, the brushed off dust will no longer escape into the surrounding air and thus affect the processing. It will be bound near the air inlet, and the heavier dust will fall into the collection box 23.

[0059] The cleaning member also includes a mounting shell 27 fixedly connected to the support seat 21. The mounting shell 27 is cylindrical with openings at both ends. The mounting shell 27 is communicated with the support seat 21. A shell cover 28 is fixedly connected to the inner wall of the mounting shell 27. The mounting rod 25 is cylindrical, and the top of the mounting rod 25 is rotatably connected to the lower surface of the shell cover 28. The mounting rod 25 and the mounting shell 27 are coaxially arranged. A plurality of mounting surfaces 29 are provided on the surface of the mounting rod 25. A plurality of groups of bristles 26 are fixedly connected to the mounting surfaces 29. An escape opening for the bristles 26 to extend out is provided on the surface of the mounting shell 27 at a position directly opposite to the filter screen 19. A strip protrusion 30 is fixedly connected to the inner wall of the mounting shell 27. The rotation of the mounting rod 25 can drive the plurality of groups of bristles 26 to be in the escape opening position in turn to clean the filter screen 19. By setting the strip protrusion 30, the bristles 26 can be deformed to change the gaps between the bristles 26, so as to facilitate cleaning of dust attached to the bristles 26.

[0060] A supporting plate 31 is fixedly connected to one side of the spindle box 2, and a rotating shaft 32 is rotatably connected to one side of the supporting plate 31. One end of the rotating shaft 32 is fixedly connected to a driving bevel gear 33, and a top end of the mounting rod 25 is fixedly connected to a connecting shaft 34. The top end of the connecting shaft 34 passes through the shell cover 28 and is fixedly connected to a driven bevel gear 35. The driving bevel gear 33 and the driven bevel gear 35 are meshed. A driving pulley ring 36 is fixedly connected to the surface of the spindle clamp 3, and a driven pulley 37 is rotatably connected to one side of the supporting plate 31. The surfaces of the driving pulley ring 36 and the driven pulley 37 are transmission-connected with the same transmission belt 38. The diameter of the driving pulley ring 36 is larger than that of the driven pulley 37. A residual gear 39 is fixedly connected to one side of the driven pulley 37, and a driven gear 40 is fixedly connected to the surface of the rotating shaft 32. The residual gear 39 meshes with the driven gear 40, and the residual gear 39 is meshed with the driven gear 40. The radius of the driven gear 40 is equal, and the main shaft clamp 3 rotates to drive the active pulley ring 36 to rotate, and then drives the driven pulley 37 to rotate rapidly under the action of the transmission belt 38, and then drives the residual gear 39 to rotate. By setting the residual gear 39, the driven gear 40 is driven to rotate intermittently, and then the rotating shaft 32 is driven to rotate, and then the active bevel gear 33 is driven to rotate, and then the driven bevel gear 35 is driven to rotate, and then the rotating shaft 32 and the mounting rod 25 are driven to rotate intermittently, so that the bristles 26 with dust at the avoidance port enter the inside of the mounting shell 27 for cleaning, and the clean bristles 26 in the mounting shell 27 are moved to the avoidance port to clean the filter 19. Among them, the number of mounting surfaces 29 is N, and the residual gear 39 is 1 / N of the full gear. In this embodiment, the number of mounting surfaces 29 is four, and the residual gear 39 is one-quarter of the full gear.

[0061] A vertical plate 41 is fixedly connected to the upper surface of the shell cover 28, a sliding hole is provided on the front side of the vertical plate 41, and a sliding rod 42 is slidably connected to the inner wall of the sliding hole, a spherical positioning end 43 is formed at the top of the sliding rod 42, and a plurality of positioning grooves matched with the positioning end 43 are provided on the surface of the connecting shaft 34, one end of the sliding rod 42 is fixedly connected to a spring seat 44, and a return spring 45 is sleeved on the surface of the sliding rod 42, one end of the return spring 45 is fixedly connected to the vertical plate 41, and the other end of the return spring 45 is fixedly connected to the spring seat 44. By setting the return spring 45, the spring seat 44 has a tendency to approach the connecting shaft 34, thereby driving the positioning end 43 of the sliding rod 42 to be inserted into the positioning groove, and by setting the hemispherical positioning end 43, the rotation of the mounting rod 25 can be facilitated.

[0062] Working principle: When the ultrasonic impact and ultrasonic rolling equipment is used, the user first uses the spindle clamp 3 and the movable clamp 7 to fix the rod-shaped workpiece 8, and then uses the spindle box 2 to drive the spindle clamp 3, so that the spindle clamp 3 drives the rod-shaped space to rotate, and then respectively starts the ultrasonic impact component 10 and the ultrasonic rolling component 11, the ultrasonic impact component 10 and the ultrasonic rolling component 11 process the rod-shaped workpiece 8, and at the same time starts the motor 15, the output end of the motor 15 drives the threaded screw 13 to rotate, and then drives the fixed block 14 to move, the fixed block 14 drives the moving seat 9 to move, and the moving seat 9 drives the ultrasonic impact component The ultrasonic impact component 10 and the ultrasonic rolling component 11 move synchronously to realize automatic processing of the rod-shaped workpiece 8. In this process, the ultrasonic impact component 10 and the ultrasonic rolling component 11 are arranged along the radial direction of the rod-shaped workpiece 8, so that the ultrasonic impact component 10 and the ultrasonic rolling component 11 act on both sides of the rod-shaped workpiece 8 to offset the force, reduce the vibration of the rod-shaped workpiece 8, and improve the processing effect. At the same time, the spindle fixture 3 and the movable fixture 7 are used to reduce the vibration of the rod-shaped workpiece 8, and the spindle fixture 3 is used to drive the rod-shaped workpiece 8 to rotate, so as to improve the uniformity of stress distribution and further reduce the vibration of the workpiece. , start the cooling fan 18, the cooling fan 18 works to dissipate heat at the processing parts of the ultrasonic impact component 10 and the ultrasonic rolling component 11, reduce the high degree of vibration of the rod-shaped workpiece 8 due to the temperature increase, use the filter 19 to prevent dust from being carried to the surface of the rod-shaped workpiece 8, when the filter 19 moves with the moving seat 9, use the bristles 26 to brush off the dust attached to the surface of the filter 19 to prevent the filter 19 from being blocked, in this process, the main shaft fixture 3 rotates to drive the active pulley ring 36 to rotate, the active pulley ring 36 drives the driven pulley 37 to rotate rapidly under the action of the transmission belt 38, and the driven pulley 37 drives the residual gear 39 to rotate, the residual gear 39 intermittently drives the driven gear 40 to rotate, the driven gear 40 drives the rotating shaft 32 to rotate, the rotating shaft 32 drives the active bevel gear 33 to rotate, the active bevel gear 33 drives the driven bevel gear 35 to rotate, the driven bevel gear 35 drives the rotating shaft 32 and the mounting rod 25 to rotate intermittently, so that the bristles 26 with dust at the avoidance port enter the inside of the mounting shell 27 for cleaning, and the clean bristles 26 in the mounting shell 27 are moved to the avoidance port to clean the filter 19, so that the ultrasonic impact and ultrasonic rolling equipment has the characteristic of improving the workpiece processing efficiency.

[0063] Example 2

[0064] like Fig.12 As shown, a multi-profile path composite surface strengthening method based on ultrasonic impact-rolling includes the following steps:

[0065] S1. Matrix material pretreatment

[0066] The oxide film and oil stains in the damaged area of ​​45CrNiMoVA steel were removed by using 200-mesh and 400-mesh sandpaper, and the surface was cleaned with anhydrous ethanol to show the damaged area.

[0067] S2. Select a suitable iron-based alloy powder ratio and process the powder;

[0068] The weight ratio of each element in the iron-based alloy powder is: C 0.18%-0.24%, Ni 1.8%-2.5%, Cr17%-18.5%, Mn 0.13%-0.25%, Si 0.9%-1.2%, B 1.1%-1.4%, the balance is iron, the powder particle size is 45-150μm, and the spherical powder is ≥90%. The alloy powder is dried in a drying oven at 110℃ for 2h and set aside.

[0069] S3. Use laser cladding technology to prepare the coating on the substrate surface.

[0070] The powder obtained from S2 was used to prepare the coating on the substrate surface using laser cladding technology.

[0071] S4. Perform flaw detection and development on the coating surface to observe whether there are micro cracks on the surface. If there are cracks, return to S3 to prepare the coating again.

[0072] S5. Post-heat treatment is used to eliminate the residual stress between the coating and the substrate interface. The heat treatment temperature is 240℃±10℃, the insulation time is 2h, and then the furnace is cooled for 1 hour and then taken out for air cooling.

[0073] S6. The coating surface is milled, and the remanufactured coating that meets the standards is subjected to ultrasonic impact + ultrasonic rolling composite treatment by the ultrasonic impact and ultrasonic rolling equipment in Example 1 to improve the surface integrity.

[0074] Ultrasonic impact parameters: ultrasonic frequency 21.5kHz, working current 1.6A, amplitude 30μm~50μm, moving speed 20mm / s, overlap width 2mm, coverage 300%.

[0075] In the step S4, surface cracks are observed in a cleaning-coloring-development sequence.

[0076] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. An ultrasonic impact and ultrasonic rolling equipment, comprising a machine base (1), the upper surface of the machine base (1) is fixedly connected to a spindle box (2), one side of the spindle box (2) is rotatably connected to a spindle clamp (3), the upper surface of the machine base (1) is fixedly connected to a guide seat (4), the upper surface of the guide seat (4) is slidably connected to a tailstock (5), a feed rod (6) is arranged in the tailstock (5), one end of the feed rod (6) is rotatably connected to a movable clamp (7), the spindle clamp (3) cooperates with the movable clamp (7) to fix a rod-shaped workpiece (8), characterized in that: The upper surface of the machine base (1) is slidably connected to a movable base (9), and the upper surface of the movable base (9) is provided with an ultrasonic impact assembly (10) and an ultrasonic rolling assembly (11), respectively. The ultrasonic impact assembly (10) and the ultrasonic rolling assembly (11) are respectively located at the front and rear sides of the rod-shaped workpiece (8), and the spindle clamp (3) drives the rod-shaped workpiece (8) to rotate to cooperate with the simultaneous processing of the ultrasonic impact assembly (10) and the ultrasonic rolling assembly (11).

2. The ultrasonic impact and ultrasonic rolling equipment according to claim 1, characterized in that: The upper surface of the movable seat (9) is respectively fixedly connected to two electric slides (12); the ultrasonic impact assembly (10) and the ultrasonic rolling assembly (11) are respectively fixedly installed on the driving ends of the two electric slides (12); the ultrasonic impact assembly (10) and the ultrasonic rolling assembly (11) are arranged along the radial direction of the rod-shaped workpiece (8); the ultrasonic impact assembly (10) and the ultrasonic rolling assembly (11) act on both sides of the rod-shaped workpiece (8) to offset the acting force.

3. The ultrasonic impact and ultrasonic rolling equipment according to claim 1, characterized in that: The inner wall of the guide seat (4) is rotatably connected to a threaded screw (13); the movable seat (9) is in an inverted U shape, and the inner wall of the movable seat (9) is fixedly connected to a fixed block (14); a threaded hole is provided on one side of the fixed block (14), and the threaded hole is threadedly connected to the surface of the threaded screw (13); a motor (15) is fixedly connected to one side of the machine base (1); one end of the threaded screw (13) penetrates the surface of the guide seat (4) and is fixedly connected to the output end of the motor (15).

4. The ultrasonic impact and ultrasonic rolling equipment according to claim 1, characterized in that: A cavity (16) is formed inside the movable seat (9), a cover plate (17) is fixedly connected to the inner wall of the cavity (16), a mounting opening is provided on the upper surface of the cover plate (17), and a heat dissipation fan (18) is fixedly connected to the inner wall of the mounting opening, an air inlet is provided on the surface of the movable seat (9), and a filter screen (19) is fixedly connected to the inner wall of the air inlet.

5. The ultrasonic impact and ultrasonic rolling equipment according to claim 1, characterized in that: A support member is fixedly connected to the upper surface of the machine base (1), the support member having a vertically arranged stand (20), a support seat (21) inclined toward the rod-shaped workpiece (8) being formed on the top of the stand (20), the stand (20) and the support seat (21) being integrally formed, and a cleaning member is fixedly connected to the support seat (21).

6. The ultrasonic impact and ultrasonic rolling device according to claim 5, characterized in that: The interior of the support member is hollow, the upper surface of the support seat (21) is provided with a collecting port (22) for collecting swept dust, the interior of the stand (20) is provided with a collecting box (23), the front of the stand (20) is provided with a through opening for the collection box (23) to enter and exit, and the front of the collection box (23) is fixedly connected with a handle (24).

7. The ultrasonic impact and ultrasonic rolling device according to claim 5, characterized in that: The cleaning member comprises a mounting rod (25), the surface of which is fixedly connected with bristles (26), and the bristles (26) are in contact with the filter screen (19).

8. A multi-profile composite surface strengthening method based on ultrasonic impact-rolling: characterized in that: The following steps are involved: S1. Pretreatment of substrate materials; S2. Select a suitable iron-based alloy powder ratio and process the powder; S3. Using laser cladding technology to prepare a coating on the substrate surface; S4. Perform flaw detection and development on the coating surface to observe whether there are microcracks on the surface. If there are cracks, return to S3 to prepare the coating again; S5. Post-heat treatment is used to eliminate the residual stress between the coating and the substrate interface. The heat treatment temperature is 240℃±10℃, the holding time is 2h, and then the furnace is cooled for 1 hour and then taken out for air cooling; S6. Mill the coating surface and perform ultrasonic impact + ultrasonic rolling composite treatment on the remanufactured coating that meets the standards through ultrasonic impact and ultrasonic rolling equipment to improve the surface integrity.

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